21211122200211 has 12 divisors (see below), whose sum is σ = 31970387084688. Its totient is φ = 13525932997104.

The previous prime is 21211122200209. The next prime is 21211122200327. The reversal of 21211122200211 is 11200222111212.

21211122200211 is a `hidden beast` number, since 2 + 121 + 112 + 220 + 0 + 211 = 666.

It is not a de Polignac number, because 21211122200211 - 2¹ = 21211122200209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21211122200111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51234594480 + ... + 51234594893.

It is an arithmetic number, because the mean of its divisors is an integer number (2664198923724).

Almost surely, 2^{21211122200211} is an apocalyptic number.

21211122200211 is a deficient number, since it is larger than the sum of its proper divisors (10759264884477).

21211122200211 is a wasteful number, since it uses less digits than its factorization.

21211122200211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102469189402 (or 102469189399 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 21211122200211 its reverse (11200222111212), we get a palindrome (32411344311423).

The spelling of 21211122200211 in words is "twenty-one trillion, two hundred eleven billion, one hundred twenty-two million, two hundred thousand, two hundred eleven".